This occurs when the hot water function is locked or when the cold water function is turned off.
It can also occur when there is an issue with the panel.
Try this
Turn on the hot/cold water function.
If you hear a chime after pressing the hot/cold button, it indicates that the function is locked or deactivated, preventing the dispensing of hot or cold water.
If the power outlet is functioning, but the hot/cold button is unresponsive, then an inspection by a professional technician is required.
This guide was created for all models, so the images or content may be different from your product.